Mechanochromic response of pyrene functionalized nanocomposite hydrogels

Filippo Cellini, Leanne Block, Jie Li, Sachin Khapli, Sean D. Peterson, Maurizio Porfiri

Research output: Contribution to journalArticle

Abstract

Mechanochromic polymers display detectable changes in their fluorescence emission upon deformation of their macromolecular structure. Here, we study reversible mechanochromism of pyrene functionalized nanocomposite hydrogels. Highly stretchable nanocomposite hydrogels are prepared by free radical polymerization of poly(N-isopropylacrylamide) and pyrene terminated poly(ethylene) glycol methacrylate copolymers in the presence of nanoclay, acting as the physical crosslinker. Mechanochromic behavior is characterized through uniaxial tensile experiments, where force, deformation, and fluorescence emission are simultaneously measured. To demonstrate the application of mechanochromic nanocomposite hydrogels in pressure sensing, membranes are used to detect differential pressures on the order of 102 Pa. We envision the integration of these mechanochromic hydrogels in the design of novel force and pressure sensors with application to mechanics, fluid dynamics, and biophysics.

Original languageEnglish (US)
Pages (from-to)510-520
Number of pages11
JournalSensors and Actuators, B: Chemical
Volume234
DOIs
StatePublished - Oct 29 2016

Fingerprint

Hydrogels
Pyrene
pyrenes
Nanocomposites
nanocomposites
biophysics
fluorescence
differential pressure
Fluorescence
pressure sensors
Biophysics
fluid dynamics
free radicals
Methacrylates
glycols
copolymers
Pressure sensors
ethylene
polymerization
Free radical polymerization

Keywords

  • Fluorescence sensing
  • Mechanochromism
  • Monomer-excimer fluorescence
  • Nanocomposite hydrogel
  • Pressure sensing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Instrumentation

Cite this

Mechanochromic response of pyrene functionalized nanocomposite hydrogels. / Cellini, Filippo; Block, Leanne; Li, Jie; Khapli, Sachin; Peterson, Sean D.; Porfiri, Maurizio.

In: Sensors and Actuators, B: Chemical, Vol. 234, 29.10.2016, p. 510-520.

Research output: Contribution to journalArticle

Cellini, Filippo ; Block, Leanne ; Li, Jie ; Khapli, Sachin ; Peterson, Sean D. ; Porfiri, Maurizio. / Mechanochromic response of pyrene functionalized nanocomposite hydrogels. In: Sensors and Actuators, B: Chemical. 2016 ; Vol. 234. pp. 510-520.
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